Published April 25, 2020 © GPL3+

Smart Street Lights Using LDR and ultrasonic sensor

The street lights we are using aren't smart. Isn't it cool when a vehicle is moving on road the LED will glow automatically.

BeginnerFull instructions provided30 minutes12,301

Smart Street Lights Using LDR and ultrasonic sensor

Things used in this project

Hardware components

Arduino UNO

Ultrasonic Sensor - HC-SR04 (Generic)

LDR, 5 Mohm

Resistor 10k ohm

LED (generic)

Jumper wires (generic)

Software apps and online services

Arduino IDE

Story

Now a days, the street lights we are using are not smart. To make them more smart here is a project that glows LED automatically when a vehicle is moving onroad during night. Today this project will help you to develop a small prototype using Arduino Uno, ultrasonic sensor and LDR.

Hence we, decided to come up with the Smart Street Lights system.it's essentially a setup which uses the popular Ultrasonic Sensor(HC-SR04), LDR and Arduino Uno. Hence the power consumed for street lights can be minimized.

video:

Smart Street Lights Using LDR and ultrasonic sensor

Hardware Setup:

The HC-SR04 Ultrasonic Sensor is at the center of the vehicle. The distance can be taken when the vehicle reaches the led.

1. Gather all the components and check if led, LDR and Ultrasonic Sensor are working fine or not.

2. Connect the cathode of led to GND & anode to 13 pin of Arduino.

3. Connect the Ultrasonic Sensor pins VCC, GND, Trigpin, Echopin to 5V, GND, 9, 10 respectively to Arduino.

4. Connect one end of LDR to 10K resister to A0 pin of Arduino Uno. and other end to 5V supply. The other pin of resister to GND pin of Arduino Uno.

NOTE: Refer the Schematics of any guidance

1 / 4 • Smart Street Lights With LDR and ultrasonic sensor

Working Principle:

The working principle is very simple. The Arduino Uno continuously checks for the communication from ultrasonic sensor and LDR. The led will be ON when the light intensity and the distance from ultrasonic sensor are satisfied. Otherwise the led will be in OFF position. This is the working principle of Smart Street Lights With LDR and ultrasonic sensor. So that we can minimize the power usage of street lights.

Code

Smart Street Lights Using LDR and ultrasonic sensor

const int trigpin=9;
const int echopin=10;
const int ledpin=13;
const int ldrpin=A0;
long duration;
int distance;
int safedistance;
void setup() {
  pinMode(trigpin,OUTPUT);
  pinMode(echopin,INPUT);
  pinMode(ledpin,OUTPUT);
  pinMode(ldrpin,INPUT);
 
}

void loop() {
  Serial.begin(9600);
  digitalWrite(trigpin,LOW);
  delayMicroseconds(2);
  digitalWrite(trigpin,HIGH);
  delayMicroseconds(10);
  digitalWrite(trigpin,LOW);
  duration=pulseIn(echopin,HIGH);
  distance=duration*0.034/2;
  safedistance=distance;
  int light=analogRead(ldrpin);
  if(light<=400){
    if(safedistance<=5){
      digitalWrite(ledpin,HIGH);
      delay(10);
    }
    else if(safedistance>5){
      digitalWrite(ledpin,LOW);
      delay(10);
    }
  }
  delay(200);
}

Credits

divya_kadava

2 projects • 3 followers

currently, I am studying BTech. And having interest to learn technology i was started in developing hardware.

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Smart Street Lights Using LDR and ultrasonic sensor

Smart Street Lights Using LDR and ultrasonic sensor

Things used in this project

Hardware components

Software apps and online services

Story

Hardware Setup:

Working Principle:

Schematics